This digital clock is suitable for chess and other games that require countdown, count up, bonus, and delay timing functions. It is lightweight and compact, making it easy to carry in most bags and ideal for club or tournament use. Features: - Large flexible buttons with improved press sensitivity - Durable ABS plastic construction - Supports bonus and delay timing modes - Portable and energy-saving design Functions: - Basic: Set basic time - Bonus: Set basic time and bonus time - Delay: Set basic time, second reading times, and delay period - Positive Timing: Set basic time to 0 for overall rationing system Specifications: - Material: ABS - Color: Black / Yellow (Optional) - Battery: 2 * AAA battery (Not included) - Screen size: 103 * 23mm / 4.06 * 0.91in - Item size: 140 * 88 * 45mm / 5.51 * 3.46 * 1.77in - Item weight: 105g / 3.70 ounce - Package size: 150 * 100 * 50mm / 5.91 * 3.94 * 1.97in - Package weight: 157g / 5.54 ounce Packing List: 1 * Chess Clock